/* 暗黑风基础样式 */
body {
  background: #1a1a1a;
  color: #fff;
  font-family: "微软雅黑";
  margin: 0;
}

 .nav {
  background: #4a148c;
  padding: 15px;
  text-align: center;
 }

 .nav a {
  color: white;
  text-decoration: none;
  margin: 0 20px;
  font-size: 18px;
 }

 .nav a:hover {
  color: #ffd700;
  text-shadow: 0 0 10px #ff00ff;
 }

 .glow {
  text-align: center;
  text-shadow: 0 0 20px #ff00ff;
 }

 img {
  width: 80%;
  display: block;
  margin: 20px auto;
  border: 3px solid #ff00ff;
 }